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Finding the Fourth Proportional to 909.41, 1,363.28 and 361.91

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Solution

The fourth proportional to 909.41, 1,363.28 and 361.91 is: 542.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    909.41 : 1,363.28 = 361.91 : x
  2. Step 2: Convert to fraction form
    909.41/1,363.28 = 361.91/x
  3. Step 3: Cross multiply
    909.41x = 1,363.28 × 361.91
  4. Step 4: Simplify right side
    909.41x = 493,384.66
  5. Step 5: Solve for x
    x = 493,384.66/909.41
  6. Step 6: Final answer
    x = 542.54

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.